The High Energy Astrophysics Science Archive Research Center (HEASARC) is the
primary archive for NASA's (and other space agencies') missions studying
electromagnetic radiation from
extremely energetic cosmic phenomena ranging from
black holes to the Big Bang. Since its
merger with the Legacy Archive for Microwave Background Data Analysis
(LAMBDA) in 2008, the HEASARC
archive contains data
obtained by high-energy astronomy missions observing in the
extreme-ultraviolet (EUV), X-ray, and gamma-ray bands, as well as data from
space missions, balloons, and ground-based facilities that have studied the
relic cosmic microwave background (CMB) radiation in the sub-mm, mm and
cm bands.

The HEASARC is a member of the NASA Astronomical
Virtual Observatories (NAVO) where we work with other NASA archives to
ensure comprehensive and consistent VO access to NASA mission datasets.
Users may now query the HEASARC's catalogs using VO-enabled services and
specialized tools. This page describes
how to get to the HEASARC VO-enabled
services and provides information on other HEASARC VO activities.

The Amazing Year 2017 in High-Energy Astrophysics(07 Dec 2017)
2017 was a banner year for our field. We list here some of the
important events in high-energy astronomy (X-ray astronomy, gamma-ray
astronomy, gravitational wave and cosmic-ray astronomy) which occurred and/or
were announced in this last year. Let's see if 2018 can be even better!

Winners of the 2018 Breakthrough Prize in Fundmental Physics Have Been Announced(05 Dec 2017)
Congratulations to Charles L. Bennett, Gary Hinshaw, Norman
Jarosik, Lyman Page Jr., David N. Spergel, and the members of the WMAP Science
Team for winning this prestigious award, the "Oscar of Science". The HEASARC is
particularly happy since several current members of its LAMBDA component
(Mike Greason, Nils Odegard and Janet Weiland) and its one-time director, Gary
Hinshaw, were so honored.

NuSTAR CALDB Update (04 Dec 2017)
The NuSTAR CALibration DataBase was updated on December 4, 2017 (CALDB version 20171204). This updates the NuSTAR clock correction file to version 76, valid through 2017-12-04.

XSPEC 12.9.1s Patch Released(04 Dec 2017)
Adds a new class member called Fit.nullhy to PyXspec. This provides access to the null hypothesis probability reported after chi-square fits.